CVE-2023-5217

HIGHNVD 8.89.0▲Trending — 4 sources updated this weekExploited in the wild

8.8

Heap buffer overflow in vp8 encoding in libvpx in Google Chrome prior to 117.0.5938.132 and libvpx 1.13.1 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)

CVSS v3: 8.8
EG Score: 9.0(high)
EPSS: 89.9%
KEV: ⚠ Exploited

Published

September 28, 2023

Last Modified

October 24, 2025

Advisory Details (10)

Auto-updated Jun 2, 2026

⚠️ Active exploitation confirmed. No patch confirmed yet.

generic

oss-security - Re: Re: CVE-2023-5217: Heap buffer overflow in vp8 encoding in libvpx

http://www.openwall.com/lists/oss-security/2023/09/29/7

generic

oss-security - Re: CVE-2023-5217: Heap buffer overflow in vp8 encoding in libvpx

http://www.openwall.com/lists/oss-security/2023/09/29/2

generic

oss-security - Re: CVE-2023-5217: Heap buffer overflow in vp8 encoding in libvpx

http://www.openwall.com/lists/oss-security/2023/09/29/14

generic🔴 Active Exploitation

oss-security - Re: CVE-2023-5217: Heap buffer overflow in vp8 encoding in libvpx

http://www.openwall.com/lists/oss-security/2023/09/29/12

generic

oss-security - Re: CVE-2023-5217: Heap buffer overflow in vp8 encoding in libvpx

http://www.openwall.com/lists/oss-security/2023/09/29/11

generic

oss-security - Re: CVE-2023-5217: Heap buffer overflow in vp8 encoding in libvpx

http://www.openwall.com/lists/oss-security/2023/09/29/1

generic🔴 Active Exploitation

oss-security - Re: CVE-2023-5217: Heap buffer overflow in vp8 encoding in libvpx

http://www.openwall.com/lists/oss-security/2023/09/28/6

generic🔴 Active Exploitation

oss-security - CVE-2023-5217: Heap buffer overflow in vp8 encoding in libvpx

http://www.openwall.com/lists/oss-security/2023/09/28/5

generic🔴 Active Exploitation

Full Disclosure: APPLE-SA-10-10-2023-1 iOS 16.7.1 and iPadOS 16.7.1

http://seclists.org/fulldisclosure/2023/Oct/16

generic🔴 Active Exploitation

Full Disclosure: APPLE-SA-2023-10-04-1 iOS 17.0.3 and iPadOS 17.0.3

http://seclists.org/fulldisclosure/2023/Oct/12

Patch Availability(29)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	vpx-tools (1.5.0-2ubuntu1.1+esm2) @ xenial	2026-06-03	ubuntu
ubuntu	vpx-tools (1.3.0-2ubuntu0.1~esm3) @ trusty	2026-06-03	ubuntu
ubuntu	firefox-mozsymbols (118.0.1+build1-0ubuntu0.20.04.1) @ focal	2026-06-03	ubuntu
ubuntu	xul-ext-lightning (1:115.3.1+build1-0ubuntu0.22.04.2) @ jammy	2026-06-03	ubuntu
ubuntu	vpx-tools (1.12.0-1ubuntu1.2) @ lunar	2026-06-03	ubuntu
ubuntu	vpx-tools (1.7.0-3ubuntu0.18.04.1+esm1) @ bionic	2026-06-03	ubuntu
redhat	libvpx-0:1.9.0-7.el9_0	2023-10-09	redhat
redhat	libvpx-0:1.7.0-10.el8_6	2023-10-09	redhat
redhat	libvpx-0:1.7.0-8.el8_2	2023-10-09	redhat
redhat	libvpx-0:1.7.0-10.el8_8	2023-10-09	redhat
redhat	libvpx-0:1.7.0-10.el8_4	2023-10-09	redhat
redhat	libvpx-0:1.9.0-7.el9_2	2023-10-09	redhat
redhat	libvpx-0:1.7.0-8.el8_1	2023-10-09	redhat
redhat	thunderbird-0:115.3.1-1.el7_9	2023-10-05	redhat
redhat	firefox-0:115.3.1-1.el7_9	2023-10-05	redhat
redhat	firefox-0:115.3.1-1.el8_8	2023-10-04	redhat
redhat	firefox-0:115.3.1-1.el8_1	2023-10-04	redhat
redhat	firefox-0:115.3.1-1.el9_2	2023-10-04	redhat
redhat	thunderbird-0:115.3.1-1.el9_0	2023-10-04	redhat
redhat	firefox-0:115.3.1-1.el8_4	2023-10-04	redhat
redhat	thunderbird-0:115.3.1-1.el8_2	2023-10-04	redhat
redhat	thunderbird-0:115.3.1-1.el9_2	2023-10-04	redhat
redhat	thunderbird-0:115.3.1-1.el8_6	2023-10-04	redhat
redhat	thunderbird-0:115.3.1-1.el8_1	2023-10-04	redhat
redhat	firefox-0:115.3.1-1.el8_2	2023-10-04	redhat
redhat	firefox-0:115.3.1-1.el8_6	2023-10-04	redhat
redhat	firefox-0:115.3.1-1.el9_0	2023-10-04	redhat
redhat	thunderbird-0:115.3.1-1.el8_8	2023-10-04	redhat
redhat	thunderbird-0:115.3.1-1.el8_4	2023-10-04	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)

npm(1)

Package	Vulnerable range	Fixed in	Dependents
electron	—	27.0.0-beta.8	—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-787Out-of-bounds Write

All Vendor Advisories

(25)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 20× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-03 19:09 UTCkev_newly_listed
2026-06-03 15:45 UTCEG score recompute
2026-06-03 15:45 UTCVendor advisory
2026-06-03 11:45 UTCEG score recompute
2026-06-03 11:45 UTCVendor advisory
2026-06-03 07:44 UTCEG score recompute
2026-06-03 07:44 UTCVendor advisory
2026-06-03 03:44 UTCEG score recompute
2026-06-03 03:44 UTCVendor advisory
2026-06-02 23:44 UTCEG score recompute
2026-06-02 23:44 UTCVendor advisory
2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-02 19:43 UTCEG score recompute
2026-06-02 19:43 UTCVendor advisory
2026-06-02 18:32 UTCkev_newly_listed
2026-06-02 15:43 UTCEG score recompute
2026-06-02 15:43 UTCVendor advisory
2026-06-02 11:41 UTCEG score recompute
2026-06-02 11:41 UTCVendor advisory

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

GitHub PoCUT-Security/cve-2023-5217-poc
First seen Oct 6, 2023
A PoC to trigger CVE-2023-5217 from the Browser WebCodecs or MediaRecorder interface.
Open source ↗

Frequently asked(6)

What is CVE-2023-5217?

CVE-2023-5217 is a high vulnerability published on September 28, 2023. Heap buffer overflow in vp8 encoding in libvpx in Google Chrome prior to 117.0.5938.132 and libvpx 1.13.1 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)

When was CVE-2023-5217 disclosed?

CVE-2023-5217 was first published in the National Vulnerability Database on September 28, 2023, with the most recent update on October 24, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-5217 actively exploited?

Yes. CISA added CVE-2023-5217 to the Known Exploited Vulnerabilities catalog on October 2, 2023, affecting Google Chromium libvpx. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.

What is the CVSS score of CVE-2023-5217?

CVE-2023-5217 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.

Which products are affected by CVE-2023-5217?

CVE-2023-5217 affects Google Chromium libvpx. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.

How do I remediate CVE-2023-5217?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-5217, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2023-5217

Explore →

Is Your Infrastructure Affected by CVE-2023-5217?

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CVE-2023-5217

Published

Last Modified

Advisory Details (10)

oss-security - Re: Re: CVE-2023-5217: Heap buffer overflow in vp8 encoding in libvpx

oss-security - Re: CVE-2023-5217: Heap buffer overflow in vp8 encoding in libvpx

oss-security - Re: CVE-2023-5217: Heap buffer overflow in vp8 encoding in libvpx

oss-security - Re: CVE-2023-5217: Heap buffer overflow in vp8 encoding in libvpx

oss-security - Re: CVE-2023-5217: Heap buffer overflow in vp8 encoding in libvpx

oss-security - Re: CVE-2023-5217: Heap buffer overflow in vp8 encoding in libvpx

oss-security - Re: CVE-2023-5217: Heap buffer overflow in vp8 encoding in libvpx

oss-security - CVE-2023-5217: Heap buffer overflow in vp8 encoding in libvpx

Full Disclosure: APPLE-SA-10-10-2023-1 iOS 16.7.1 and iPadOS 16.7.1

Full Disclosure: APPLE-SA-2023-10-04-1 iOS 17.0.3 and iPadOS 17.0.3

Patch Availability(29)

Affected Packages

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

Frequently asked(6)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-5217?

Same vendor

Same CWE

CVE-2023-5217

📅 Published

🔄 Last Modified

📋 Advisory Details (10)

oss-security - Re: Re: CVE-2023-5217: Heap buffer overflow in vp8 encoding in libvpx

oss-security - Re: CVE-2023-5217: Heap buffer overflow in vp8 encoding in libvpx

oss-security - Re: CVE-2023-5217: Heap buffer overflow in vp8 encoding in libvpx

oss-security - Re: CVE-2023-5217: Heap buffer overflow in vp8 encoding in libvpx

oss-security - Re: CVE-2023-5217: Heap buffer overflow in vp8 encoding in libvpx

oss-security - Re: CVE-2023-5217: Heap buffer overflow in vp8 encoding in libvpx

oss-security - Re: CVE-2023-5217: Heap buffer overflow in vp8 encoding in libvpx

oss-security - CVE-2023-5217: Heap buffer overflow in vp8 encoding in libvpx

Full Disclosure: APPLE-SA-10-10-2023-1 iOS 16.7.1 and iPadOS 16.7.1

Full Disclosure: APPLE-SA-2023-10-04-1 iOS 17.0.3 and iPadOS 17.0.3

Patch Availability(29)

Affected Packages

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(6)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-5217?

🔗 Related CVEs(same vendor + same CWE)

Same vendor

Same CWE

Published

Last Modified

Advisory Details (10)

Frequently asked(6)

Related CVEs(same vendor + same CWE)